/*

This file is part of Ext JS 4

Copyright (c) 2011 Sencha Inc

Contact:  http://www.sencha.com/contact

Commercial Usage
Licensees holding valid commercial licenses may use this file in accordance with the Commercial Software License Agreement provided with the Software or, alternatively, in accordance with the terms contained in a written agreement between you and Sencha.

If you are unsure which license is appropriate for your use, please contact the sales department at http://www.sencha.com/contact.

*/
/**
 * @class Ext.chart.Highlight
 * A mixin providing highlight functionality for Ext.chart.series.Series.
 */
Ext.define('Ext.chart.Highlight', {

    /* Begin Definitions */

    requires: ['Ext.fx.Anim'],

    /* End Definitions */

    /**
     * Highlight the given series item.
     * @param {Boolean|Object} Default's false. Can also be an object width style properties (i.e fill, stroke, radius) 
     * or just use default styles per series by setting highlight = true.
     */
    highlight: false,

    highlightCfg : null,

    constructor: function(config) {
        if (config.highlight) {
            if (config.highlight !== true) { //is an object
                this.highlightCfg = Ext.apply({}, config.highlight);
            }
            else {
                this.highlightCfg = {
                    fill: '#fdd',
                    radius: 20,
                    lineWidth: 5,
                    stroke: '#f55'
                };
            }
        }
    },

    /**
     * Highlight the given series item.
     * @param {Object} item Info about the item; same format as returned by #getItemForPoint.
     */
    highlightItem: function(item) {
        if (!item) {
            return;
        }
        
        var me = this,
            sprite = item.sprite,
            opts = me.highlightCfg,
            surface = me.chart.surface,
            animate = me.chart.animate,
            p, from, to, pi;

        if (!me.highlight || !sprite || sprite._highlighted) {
            return;
        }
        if (sprite._anim) {
            sprite._anim.paused = true;
        }
        sprite._highlighted = true;
        if (!sprite._defaults) {
            sprite._defaults = Ext.apply({}, sprite.attr);
            from = {};
            to = {};
            for (p in opts) {
                if (! (p in sprite._defaults)) {
                    sprite._defaults[p] = surface.availableAttrs[p];
                }
                from[p] = sprite._defaults[p];
                to[p] = opts[p];
                if (Ext.isObject(opts[p])) {
                    from[p] = {};
                    to[p] = {};
                    Ext.apply(sprite._defaults[p], sprite.attr[p]);
                    Ext.apply(from[p], sprite._defaults[p]);
                    for (pi in sprite._defaults[p]) {
                        if (! (pi in opts[p])) {
                            to[p][pi] = from[p][pi];
                        } else {
                            to[p][pi] = opts[p][pi];
                        }
                    }
                    for (pi in opts[p]) {
                        if (! (pi in to[p])) {
                            to[p][pi] = opts[p][pi];
                        }
                    }
                }
            }
            sprite._from = from;
            sprite._to = to;
            sprite._endStyle = to;
        }
        if (animate) {
            sprite._anim = Ext.create('Ext.fx.Anim', {
                target: sprite,
                from: sprite._from,
                to: sprite._to,
                duration: 150
            });
        } else {
            sprite.setAttributes(sprite._to, true);
        }
    },

    /**
     * Un-highlight any existing highlights
     */
    unHighlightItem: function() {
        if (!this.highlight || !this.items) {
            return;
        }

        var me = this,
            items = me.items,
            len = items.length,
            opts = me.highlightCfg,
            animate = me.chart.animate,
            i = 0,
            obj, p, sprite;

        for (; i < len; i++) {
            if (!items[i]) {
                continue;
            }
            sprite = items[i].sprite;
            if (sprite && sprite._highlighted) {
                if (sprite._anim) {
                    sprite._anim.paused = true;
                }
                obj = {};
                for (p in opts) {
                    if (Ext.isObject(sprite._defaults[p])) {
                        obj[p] = {};
                        Ext.apply(obj[p], sprite._defaults[p]);
                    }
                    else {
                        obj[p] = sprite._defaults[p];
                    }
                }
                if (animate) {
                    //sprite._to = obj;
                    sprite._endStyle = obj;
                    sprite._anim = Ext.create('Ext.fx.Anim', {
                        target: sprite,
                        to: obj,
                        duration: 150
                    });
                }
                else {
                    sprite.setAttributes(obj, true);
                }
                delete sprite._highlighted;
                //delete sprite._defaults;
            }
        }
    },

    cleanHighlights: function() {
        if (!this.highlight) {
            return;
        }

        var group = this.group,
            markerGroup = this.markerGroup,
            i = 0,
            l;
        for (l = group.getCount(); i < l; i++) {
            delete group.getAt(i)._defaults;
        }
        if (markerGroup) {
            for (l = markerGroup.getCount(); i < l; i++) {
                delete markerGroup.getAt(i)._defaults;
            }
        }
    }
});
